6 



PRINCIPLES OF PLANT-TERATOLOGY. 



In some of the plantains (Plantago major and P. 

 lanceolata) the apex of the spike may develop further 

 to form a rosette of foliage-leaves. A similar pheno- 

 menon is seen in the lupin (PI. XXVI, fig. 3). 



Good instances of normal vegetative proliferation 

 are the pine-apple (Bromelia Ananas) and the bottle- 

 brush (Gallistemon). 



2. The Flowek. — Here also the proliferation may 

 be reproductive or vegetative. 



In the case of the former, in many plants the floral 



Fig. 61. — Rosa centifolia (Garden Rose). Proliferation of flower into a 

 small inflorescence bearing- two roses. 



axis may elongate and produce an entire inflorescence,, 

 as in Trifolium repens and in many Composite, e.g. 

 the "hen-and-chickens"-daisy (Bellis perennis var.), and 

 the sneeze-weed (Helenium autumn ah). In the plan- 

 tains, most pronounced in P. major, the individual 

 flowers of the spike develop into branches whose 

 flowers may do the same until sometimes as many as 

 six or seven generations of branches may constitute 

 a complex panicle replacing the normal spike (PI. 

 XXVII, figs. 2 and 3). 



In the feather-hyacinth (Miifcari comosum) there is 

 a remarkable variety in which the flowers of the spike 

 are replaced by delicate, elongated branches which are 



